Continuously rotary characterwheel printing machine



CONTINUOUSLY ROTARY CHARACTER-WHEEL PRINTING MACHINE Filed Sept. 15. 194'? L. R. PROUTY 4 Sheets-Sheet l INVENTOR BY Z 'K ATTORNEY L. R. PROUTY oct. 14, 1952 2,613,796

CONTINUOUSLY vROTARY CHARACTER-WHEEL PRINTING MACHINE 4 Sheets-Sheet 2 Filed Sept. 15, 1947 lllllvi mu INVENTOR l.. R. P Rou'rY 2,613,796

WH'EL- 1=R1NT1NG MACHINE Oct. 14, 1952 CO-NTINUOUSLY ROTARY CHARACTER-v Filed Sept. l5, 1947 4 Sheets-Sheet 3 mw @n Nm uw Nm. uw QW mm. mw m L .um wu l UHU Nm uw @m .vw @m mm m.

Lh/RE/VCE P19007) ATTORNEY Oct. 14, 1952 L. R. PRou'rY 2,613,796

CONTINUOUSLY ROTARY CHARACTER-WHEEL PRINTING MACHINE Filed Sept. l5, 194'? 4 Sheets-Sheet 4 /Qff INVENTOR ATTORNEY Patented Oct. 14, 1952 -umTsosrrAras; PATENT oFFlcEf CONTINU-(rustst- ROTARY@ cHARACTEnf. e

WHEELiPnINTING.

' liavvrencegRProuty, NewYork, NiY." Applicationzsptemberz'l5, 1947;.Serial`Nozi7'7 41.1011l 521clams.;l (c1. 19T-1a Other objects are to provide atypewritngsmachine .havinggreatspeedand power whichis not 15y liable to -frequent breakage. asfin., other `l;`now n` power. typewriters.

Other objects of: the invention areto provide;v an improved typewriting machine ofthe j rotor# typewheeltype toreplace the clumsy. barv andv- 20 lever' system off conventional "typewriters, andjto prodiicea completely electronicjtypewriter easily adaptable tomass production; andad'aptableto" veryhigli speed 'without' danger-'ofthe type 'pilingl` up upon'each .other during'operation;

Additional objects rof the invention areto effectisimpli'city and 'eflicency in such typewriters and" to. provide an easily `assembled'a-rrd adjusted; ccm'- f pacty light. weight',` portableextremelyf simple'M typewriterof this kindwhich is economical, durfable; safe 'andivery reliable irl-operatiomand easy# and'economica-l to manufactures f Still other objects of .the-A invention kwill appear`l asthedescription proceeds;y and=whilefliereinde-1l` tails ofthe-.inventionfare :described='in=thespecifl=n cation and someof the:clairnsl,` the*inventionias` 35.1

described in the broader claims is not limited'to'i these andzmany and.various changes;l may be madewithout :departing-1 from the; scope of the; invention asf;'cltirned` in the,- broaden claimS.

Thefinventive .featuresfforthe:accomplishmentx40 of thesey and p therv objects are shown herein; in.l connection with af. rotor-type -wheel ,typewriter.-` which briefly :statedincludesv apair'oi constanilyfy rotaryupper. and lower case type-carrying. wheelsldisposedlside-byfside, carrying to 'thewlieels ,andi carrying Ythe typ e blocls con tainingmjagnetic.. material, which when. inactive are. disposedjrearwardly circumferentially oftl'1 'e v wheels and there magnetically held 'byjthei mag;

netisrrrl ofiagstationary magnethavingr ag'cylindri 50 f cali'pole face" disposedvll between` said' wheels: A releasing; electromagnet dis'posablf'e-4A adjacent to the -'path's'- ofthe inactive blocks of feithere'ofi'said f wheels:andyy normally; disposedl adjacent. to tl-ie path .offithelower:-case blocksioffone wheelis typebars pivoted 45.1

adaptedwhen energizedfto draw a.passiiil;blick,

from the inuence of. said pole L face. and j allowi' centrifugal force to dispose thev bar 'outwardly;l

and substantially Yradially as the.wheel.r0tates; The .blocks haveprinting type on the acewhlch."

isforward ywhen the bars aretl'ius d isposedjontf` wardly; and a platen for the.=l12 l er` tojbetypedw uponis disposed in thepath' of `-the"v type ."wlien' thus disposed forwardly toreceive thejimpactof. the type. Keys corresponding. to the respective* type,` blocks. cooperate with means 1 controlledf the respective Akeys whendepressedor enelgiz insi'H the releasing electromagnet as theblock" conce spending to the: depressed-key passes-theirelea'sing magnet thus to detach thefselectedftype lblockj and allow it' to'print; Shift-keyoperated means are provided 'for vvatwill moving-the releasing mage* net adjacent to--thepa-th` of the blocks off-tli'ef''v upper casewheel.

In -'the accompanying drawing-showing; by iwayi of example, onejof many possiblefembodimentsofy the invention;

Fig. l is a plan showing the assembledtypelwriter; l f

Fig; 2 is "a longitudinal vertical sectional'viw-g partly in elevation; showing the fas'sembleditypez.- writer; the carriage being;y shownin elevation, ltithe-- section being-taken:substantially onvthe-flne f2"f2 0`Fg-= 1; lookinginthe-directionofthe arrowsifiV of said`line; Y.

Fig. Sais .a plan showing,2 the typewriter withfv-f the carriage-land its supportremovedy- Fig. 4 is .a side elevation' on" a larger-scaleiandt partly in section, showingatypeiwheel; it'sntypef.; andgassociatedaparts;

5:. ist: a: plan showing the 5 type::wheels,fl-.ther. type and associatedggears.;

Fig. 6 shows a section-on .the-line tif-liY 'o ffEi-gx. Fig. '7 isa-fragmental verticaly sectional view, partlyin elevation', showing the capital shift keyI Fig; 8 isa vertical sectional view-vshowing. a' modified form .of characterkey; and Fig. .9 .isa wiring diagram.- f f My,` improvedv rotor typewriter. shown`-. mounted in a f rame`. or bfase l" resembling the.. conventional typewriter base and having .a. f1o.o'r 2',` a low rear' wall 3 andfliighv side .walls. 4,. 'each'. sidewall having yalower frontextensioni coni nected by a" low front` 'connectngl wall1'...6."` A. lli-shapedstationary to'pv plate or table ,1 is dis-if posed above the floor to the; rear of"said"e tens1ons 5 and has side members!!l mounted" the sidewalls 4,' eachfside member having adown: wardly offsetY intermediate `rpartgii; Transverse" tracks luf, amounted on the-frontfandeback margins of ftheA top plate' 'I1-andi'jnstftorthrear'1` 3 of said olf-set parts 9 (Fig. 2) have rearwardly and frontwardly opening grooves I3, I4.

A rectangularv carriage frame I5 is disposed between the front and intermediate tracks I0, I I and comprises end members I6 and front and rear members I1, I 8, the latter being provided with grooves I9 opposed and adjacent to the grooves I3 and I4 of said tracks I 0 and. II. A rear exterrsion frame 20 at the rear'of the carriage frame I5 comprises side members 2| secured to the carriage frame, and a cross member 22 provided with a groove 23 opposed and adjacent to the groove I3 of the rear tracks I2. Bearing balls 24 are disposed in all of the adjacent grooves, whereby the carriage frame is transversely slidable. A platen 25 disposed across the carriage frame has projecting knob-carrying shaft ends 26 rotatably mounted in said end members I6 oi' the carriage frame over said olf-set parts 9.

fhe parts above described are somewhat diagrammatically shown, as it is understood *that the important features of the invention as claimed are not limited to the particular carriage frame shown.' and are not, as claimed in Vmany of Athe claims, limited to a platen which moves longitudinally relative to the type wheel later to bev described, 'rather than the reverse.

Within the main frame I there yis provided a stationary main magnet shaft 21 of magnetically conductivevmaterial mounted fast on a bracket 28 and perpendicular to and' adjacent to the adjacentfside wall l and axially parallel to. frontwardlylof'and lower thanr the platen 25. Said shaft 21 has a shortv reduced portion 29".near its freeend about over themiddle of the iloor and a longergfurther reduced vportion 33 extending to tIieS'iI'eiel end of the shaft. A large solenoid 3l isdisposed on said shaft adjacent-to the bracket; and a disk shaped magnet pole piece 32 (Fig. 5) isfmounted fast on said short reduced portion 29 and has a cylindricalpole face coaxial'with the shaft. l

If desired, the pole face 32 may have a small inlay -33v (Fig. 4) of brass or other non-magnetic material, for slightly weakening vthe magnetic force atsaid inlay for apurpose to be explained.

The solenoid receives direct current through suitable connections (not shown) to magnetize the magnet shaft and pole piece. If desired the solenoid maybeomitted, in which case the pole piece and/ory the shaft would be permanently magnetized. The invention is not limited to the particularform of magnet.

Upper case or capital and lower case. type-e,v

carryingwheels 35,36 are rotatively mounted on the shaft 21 and said further reduced portion respectively on opposite vsides of the magnet pole lpiece-32 andslightly spaced by washers 31 therefrom, the? upper partv of each type wheel being rotatable toward the platen. Gear wheels`38 are secured fast on the 'sides of said type wheels respectively. An intermediate Abearing bracket 39 (Figf) mounted on the floor in the plane of the pole piece has an elongated bearing opening axially parallel tothe magnet shaft and disposed under theplaten and lower than the magnetjshaft which rotatably receives a countershaft 40 carryingA a grooved pulley 4I, and also carries pinions 42,thesame diameter as, and meshing with said gears A'38 respectively.` A synchronous or other constant speed ,motor 43 mounted on the rear of saidiioorZ has a shaft 'fill` having a grooved pulley 45thereonaxially parallel to the countershaft.

to stiifen the bar.

The motor may have a speed to rotate the type wheels at about 1200 revolutions per minute.

Each type wheel is provided with an annular peripheral rib 41 having a cylindrical peripheral face, and deep rabbet grooves 48, 49 on opposite sides of the rib, the rib havingtherein a seriesof transverse apertures 50 (Fig. 5) almost parallel to the shaft and slightly inwardly inclined toward the magnet pole piece.

A series of type bars 5I, which may be wholly or partly of magnetic or non-magnetic material, are, as will be explained, disposable substantially radial to the type wheel as shown at the upper part of Fig. 4, or may be disposed approximately circumferential to the type wheel in a direction rearward to its rotation and inclined toward the space around the periphery of the magnet pole piece 32.

to retain it in the aperture. The outer end of the bar has a type b lock 5d wholly or in part of magnetic material, adapted when inactive to be, by the magnetism of the pole piece 32, yieldably magnetically held, against the centrifugal force. adjacent to the respective right and left margins of the peripheral face of the magnet pole piece.V The type vbars are of a cross-section elongated in a direction transverse to the axis'of the wheel,A`

The bar tapers toward itsv pivot part, and the intermediate part of the bar is slightly outwardly Ycurved and restson the type wheel, when in inward position, to hold the block 54' slightly spaced from the periphery of the stationary pole piece 32.

vEach block, exceptas noted hereinafter, 'may 1 have in relief on its outer face a'printing letter or character 55, which when the'type bar becomes 'f substantially radial, faces forwardand is adapted to strike the platen 25y as the type wheel rotates;

The printing plane of each letter 55' is slightlyv curved and coaxial with the platen when in printing position to cause veven printing throughout .f

the letter. The typeassociatd withthe capital and lower case wheels 35, v35 respectively have upper and lower case letters and characters` thereon. The very slight inclination of the angle of the axes of said pivot parts 52 (Fig. 5) and piece 32.

Y A bracket pate 51 (Fig. amounted-0n the'.

floor 2 and disposed parallel to the plane of the'. type wheels between the large solenoid 3 I -and the i type wheels is provided with' an opening 58 snugly receiving the magnet shaft, and is provided a dis'- f tancey frontward of the magnet shaft with a rec- 'tangular opening 59 alined with a similar open? ing 6I) in a supplemental bracket El mounted onY the'jfioor near the opposite sidewall. I, Said rec--v tangular openings A59, 60. receive fast therein a. horizontal guide tube 62 of vertically elongated"I .rectangular cross-section disposed forward of the type Wheels and provided with a cutaway portion, a. cutaway l.porti0n64 adjacent tothe plate bracket 51` facing the magnet shaft. A bar 65 sudabie in saidl guideL L tube and guided therebyis provided with an an-r-V gularfend portion 66 of magnetic'material ex:

63 facing the pole piece and with Each bar has a laterally turned pivot Y part 52 (Fig. 5) disposed in one of said apertures 50,the pivot part having an angular free'end 53 Y' tended .toward :the magnet lshaft-.andfforxning an armature, Athe edge .of saidgcutaway 64 adjacent to thelibracket .plate limitingnutward movement ofthearmature.

A selecting v:and releasingr` .electromagnet 61 (Fig. y3) mounted on said bar radial :to the pole piece 32 has -a pointed corev 68 projected normally adjacentto the path of thel inactive 'lower case type blocks 54, the magnetism of'the releasing electro-magnet when instantaneously energized being 'strong enough to cooperateV with vthe centrifugal force of the revolving vtype block to withdraw' the type block from the influence ofthe main magnet pole piece 32 to allowthe centrifugal force to disposefthe type bar substantially radial to the main shaft, as in the upper part of Fig-4 to allow the type torstrike the platen. A tension spring 69 tensioned between the outer-end part ofthe tube and said bar serves vfor normallyr yieldably holding the bar in normal position with the armature 6B against said edge of the cutaway 64. A shift solenoid 10 adapted to be energized as lwill 4be explained and secured fast on said bracket plate 51 on the side remote from the armature 66 has a core v`|| projecting a short distance through the bracket platey adjacent to the armature land adapted When'the solenoid is energizedl to draw the armature 66 against the influence of the spring 69 to move the selecting electromagnet 61 from the plane of the lower case'letter blocks 'to the plane of the upper case letter"blocks. l

A 'pair o'fslightly spaced upwardly rearwardly stepped vkeyboard plates 12, 13 (Fig. 2) 'mounted one above the other and having endears '14 secured between, and insulated by'was'hers 15 from the front extension 5 of the `side walls comprise steps 16, corresponding steps having vertically alined guidefopenings 11 receiving metal stems '18 of keys 19 respectively corresponding to the typev55 of either of the type wheels, said metal stems 18`-being vertically slidable in said pairs of openings 11 and each having ya button 19 secured onV the top of the stem. A spacing bar 80 'is-mounted at vthe ends on similar stems 8| mounted in two of said alinedopenings. A spring -82 yis compressed between a collar 83 fast on 'the upper partei-each stem 18 or 8| and the flower plate 13 to furge the keys upwardly.` Each metal stem has on its lower end a disk 84 having-'aninsulatingcoating on Vits upper face. 'Insulated blocks 86 are secured fast tothe Wall 6 or'the lower face kof the lowerplate 13adjacent to veach stem; and afspring metal contact 81 mounted on each vblock and havingl its free end disposed below andunder the'adjacent turned end is instantaneously engageable by the disk 84 of the associated stem whenthe keyis pressed downwardly, at ordinary speed, and is engageable by the insulating coating vat the position 85' only as the key isbeing moved upwardly and restored by the spring 8 2.

V'Instead of the switches as in Fig. 2 I may omit the disk 84 and its coating, as will be explained hereinafter, or I may provide switches as in Fig. 8 in'fwhich 'the metal disk 84d coaxially .held'on the lower lend vofthe stem 18a by means of a metal screw*I 88 contacting the disk carries an upper 'coating-.85a yofinsulation on the yupper and peripheral faces of the disk, and a lower insulating -coating'89 on the lower face of the disk leaving 'onlya .narrow margin -of thedisk y"84a exposed. The insulating block 86 [mounted Lon the lower acefof vthe'p'late'13 has mounted thereon'a metal .Contact spring 81a "havingxan' 'intermediately downwardly curvedportion 90'. forming .a lower hook:turned toward theidisk havingdtsifree end .1.9 l engageably bysaid ilowerfcoating 8.9as the key lowers'to bend this :free end 9| downwardly to'iplace 1.the hook `undertension fand cause tthe free end .9| v*to kpoint :inwardlyndownwardly and cam from the lower coating 89 :and snapfrom the lower coating vacross .the `narrow margin :offithe disk 84uy and upper `coating 85a. Vand ,makecinstantaneous contact-withv the Idisk 84a, and then assume its normal position. Releasesandrisingof the key causes the -upper coating .85arto cam :past the yieldablehook 90 without contact /wi'thffthe metal to allow the hook -againto assume normal position.

`A commutator ibracket 93 (Fig.-3) mountedwon theoor `2 has a bearing opening k94w.a'lined with the countershaft -40 and loosely vreceiving l.a corn-A mutator shaft 95 carrying fast thereon a commutator 96 adjacenttothe endofthe-count'ershaft 40 and having segments 91 corresponding inorde'r to the characters of said type blocks 54 andessoc'iated keys 19. A disk 88I isimounte'd astzon the inner end of the commutator shaft; and'l-a clamping screw 99 adjustable lin said .bracket carries washers 190 under its headengaging opposite faces ofthe disk for holding thedisk-commutator in proper adjusted position, after adjustment by 'means of a'knobA |0| on the shaft V'95. A brush arm or brush |02-iastl and grounded-on the countershaft 40 and 'thereby-'grounded o'nthe frame of the typewriter successively 'engagessuccessive segments 91; and conductors |04,"ga'thered in a cable |05, connect the springcontacts "81 (Figs. 2 and`9) of the Vkeys 19 orf-spacer bar 80 to the respective corresponding commutator segments 91 (Figs. 3 Aand 9). vSaid disk 95 and commutator 96 are *relativelyr adjusted or positioned to cause the brush Varm |02 to engage the commutator segment '91 vcorresponding'to any'associated key 19, the spacer bar 80 and associated type block 54 or spacer location of the type wheel, as will be explained, justas said block lor spacer location comes opposite to said-releasing magl net core 68'-(Fig; 3).

A suitable '.sourceof current |01 Fi` g..9,)has one ungrounded terminal |08 andone terminal |09 connected through a condenser H0 and. a low resistance ||'|l to a ground ||2 on thejfr'ame of the machine, thereby connected through a Aground ||3 on the frame to the 'brush arm. A'A high resi-stance ||`4\ is connected between vsaid ungrounded terminal and the condenser element, of said condenser H0', nearest the ,ground H2..

`When no currentpasses thebr'ush |02, the condenser ||9 is charged, through the highre'sistance ||4; and when a. circuit is established through a closed key 'switch 18,81, conductor |04, a ccmmutator segment 91, 'the brush"|02 ground ||2 and resistance I the condenser '|0 Acauses an instant dischargethrough a cut-,ont

relay magnet H5 -having its rcoil connected by conductors vI |6, ||1, YH8, and. H9 between .said

. stepped plate 12 and said ungrounded terminal |08 of the source |01, thereby to magnetize the magnet l5 and cause it to attract an electrically conductive 'armature |20 of magnetick material adjacent to the relay magnet and normally Vretracted therefrom. A back Contact |2|.engage able by vsaid armature when retracted is electrically connected to saidungrounded terminal |08 of said source.` A selective kactuating condenser |522` is connected by conductors |23, |24, |25 and resistance I25R between the terminal |09 and .said armature, wherebyssaid Vcondenser |22 normally-is .maintained-charged. ..Axront relay contact |26 is connected through conductor |21,:the coil of the selecting release magnetA 61, resistance |28 and conductors |24, V|25 tosaid terminal |09 and is. engageable by thezarmature |204 when attracted by the relay magnet.

The condensers I|| and .|22 are normally charged; and when any letter or characterkey is being pressed, the brush |02 will during that time engage the corresponding commutator segment 91, and said cut-out relay4 magnet |.|5 will be energized and said armature attracted, whereupon said condenser |22 will discharge through thereleasing 'magnet 61, and said releasing magnet will be magnetized at the instant that the corresponding type block 54 passes the core '68, .thereby to withdraw such type block from the in iiuence of the main magnet pole piece `3,2L to allow its type bar 5| (Fig. 4)V to assume under centrifugal force an approximately radial position until thevtype strikes the platen 25 before another key-,depression takes place. n An escapement electromagnet is horizontally mounted on said floor 2. A normally open, relay spacer switch |3l, |32-is closed by the relay magnet |75 when energized. This relay switch, the'spacer escapement magnet |30 and a timedelay element |33l are all connected in series between the terminals |68, |65 by means ofecenduc'tors l H9, H6, |34, |35, |36, |31, |24, |25; whereby the spacer solenoid |30 receives current each timel the-relaymagnet is energized, whether a type blockl or spacerl locationis adjacent to the releasing'magnetf y y l The time delay element may be a retarding coil t|38 Vor a 'retarding vrelay or any desired delaying means to causethe escapement magnet |30 to become .energized va predetermined time after the relay magnet becomes energized, to allow the type to printbefore the escapement magnet .act-s. A pair-'of 'posts |40 (Fig`s2 and 3) at opposite sides of the" rear endof the .core of the escapement magnet carry-an upright escapement lever .llii intermediately pivoted between the upper ends restorer cam |42- to Vbe engagedV by an'active type bar 5| astheltype thereof strikes the-paper on the platen, andto cause the type. block to draw back suddenly from the platen to prevent smearing. The moving bar and block cam on the face of the cam |42 and plate |4| andare moved bythe cam plate into the influence of the main magnet pole piece 32 to be held thereby in normal. position just out of contact with the pole piece.

Any suitable type inking means may be provided, the type inking means |43 (Fig. 4) vhere shown comprising an open ended xed guide tube |44 secured to the lower face of the tube 62 (Fig. 2) parallel to the releasing magnet 61 and slidably receiving a tubular casing |45 extending to near the type wheel andfhaving on its side walls a pair of ears |46 adjacent to the type wheels and carrying a pin |41 loose in the perforations of the ears on which pin rotates a soft 4rubber roller |46 engaging the inactive normal position type of both wheels to be rotated bythe type. One ormore reservoirs |49 of the ball-point pen type are disposed side-by-side longitudinally of said casing and radial vto the roller and have their balls |50 engaging said roller, thereby to spread of said-posts and *carrying an uprightescapement v actuating arm |42, said lever carrying at the lowerV end an armaturev |43 opposite the magnet core end. When the escapement magnet |30is energized said arm is rocked and operates a conventional escapement mechanism (not shown) .for stepping the'carriage across the machine, and which is not a partof the present invention. VBy this arrangement, Vthe circuit of the spacer escapement magnetis separate from the relay magnet I5, or the 'circuit' of the selector magnet 61 and any usual formof delaying element v|33 in vthe spacer magnet' circuit may delay the operation of `the spacer magnet as much as de- 'sired, tokgivey the type full time to print before vthe spacer lever is actuated.

,The type lever 5| and block54 corresponding to the spacing stems 8| ofthe spacing bar are omitted or preferably merely brazed or otherwise anchored or 'suitably secured fast in inactive position on the type wheel to prevent' printing' when only the" spacing bar 30 is depressed, the secured-on bar and Iblock serving to maintain the balance of the type wheel during rotation.

The bracket 39 (Figs. 2 ande) mounted under the platen between the pinions 42 of the countershaft 40 carries a restoring means or cam such as a rubber coatedfspringl cam plate i4 of sheet metall mountedon said bracket and disposed approximately on a line tangential to the lower front face of the platen 25 and the upper rear periphery of the `type wheel ribs 50, and having `its upper end part (Fig-14) curved to act as a ink upon the rotating roller to be picked up by the type engaging Athe roller. A hinged closure 5| closing the rear end of the casing-hase lower hook |52 yieldably engaged in an indentation in the casing to hold the lid closed'. YA spring |54 compressed between the lid and aplate '|55 disposed -against the inner ends of the reservoirs serves to hold the balls |50 against theroller and the roller against thel type. Y

Fig. 7 shows thecapitai shift key k|51 (Fig. 3).,y Lower corner portions ofthe stepped plates '|2, 'I3

have large vertically alined openings |58 therein over which are secured insulating disks .|59 covering said openings and provided with alined perforations receiving a shift key stem l|60 slidable in said apertures and having its lower end engageable with the upper spring contact |6| Vof a pair of separately insulated superposed spring contacts |6| having free ends under the shift key stem |66. Conductors H6, IIB, |63,- |64, |65, |24,

k|25 connect the spring contacts in series with the shift solenoid 10 between,y the terminals |08|09,

.whereby operation of l.a shift key energizes kthe shift magnet and shifts the selecting magnet 61 from adjacent to the lower case letter Iblocks 54 to adjacent to the capital letter blocks Y The operation of vthe typewriter will beunderstood from the foregoing, and now needbesummarizedonly briefly as follows: ,y l

The paper |66 (Fig. 2) is inserted into the carriage and the platen rotated for line spacing in the, ordinary way; and the rcarriage is spaced or moved to the right or leftin the'ordinary way and is showny only diagrammatically ybeing-no part of the present'invention. The main magnet solenoid 3| (Fig. 3) is energized; and the motor 43is rotated to give the type wheels the desiredconstant speed, which may be 1200 revolutions a minute, more or less. The energization of the magnet is such that the type blocks 54 (Fig. 5) are held in inactivel position near but not touching the magnet .pole face 32, the intermediate part of the type bar15|rest ing on the type wheel, while the type faces 55 point outwardlyand are engaged and inked .by the inking roller `|48 as the type wheels rotate.` The selecting condenser |22 (Fig. 9) :is charged through the back contact |2| and the conducting armature |20 from on'eterminalrofthe source HIFI-:and through the resistor |:25R from the otherv terminalof. the source'. t The. condenser: |:Il remains ynormally l charged, through the high. resistance I I4, vand this potential is communicated through resistancev I I, the4 grounds-I I2., |3to the revolving brush arm |:02.

When a key 19 is depressed, contact between the' disk 84 *and contact spring' 81 isv as. long' as a complete.l revolution foi thev brush' |02; ,andv when the vbrush: reaches :the segment 91.130v which the engaged.: contactv spring is connected,v aV path` is established from*A thel brush, through the commutator. segment, springcont'act 8.1, key stem 18, keyboard plate 12;,y conductor I I6; coil of. the cut-I out' relayr magnet |.I5'and conductors ||1, I I8; |.l9 tovterminal |08, thusthrough the r'el-ay magnet M5, causing the: conducting rarmature |20 t0 en.- ga'ge the front-contact |26, allowingv the discharge of the selecting condenser |22 tofind. a path from oneplate of. the condenser through-the conduct-*- ingsarrnature,A the coilof the. selecting; magnet Grand. resistors |28, |25R to' the other plate'of `the'i condenser: |22,.thusf energizing thev selecting magnet 61. As theselecting'magnet is. so placed that itis energized just as'. the typeblock 54 conresponding to the depressed key 19 Iand the asso'- ciated' segment 91 passes; such. type'block' i's .attractedby the` selecting,V magnet 61'.'

.The strength ofrthe selecting magnet is such that it? combined with' centrifugal force is.' sumcientv to: vwithdraw Athe type' block from'. the inifiue'nce ofthe main; magnet'poleiface 32 allowingfthe` centrifugal force'to move: theftype bar substantially' radially outwardly as the'- typev moves4 with. its'face. forward toward the' platen.' Iii-desired, in"'order't'o facilitate the withdrawal of the'A type-block' from the influence vof the pole face 32: at the right time I. mayiwea'kenithe mag'- netic attraction atthe'pol'e: face by' the inlay 33', while maintaining'. themagneti'c attractionstrong at all other pointsfof' lsaid/pole face..

,The type vblock'.` 54V andv type bar' 5I maybe designed to' strike: the' lpaper. "oni the platen' andthe restorer' cam' |42'v substantially at th'e'same time orto/'causer thebarr to strike' the cam'` somewhat in advance. -lnJ-e'ither case the' type' hits the platen! instantlyl an'd is instantly' retracted from thelpaper'without any smear. After striking, the' type fand-,type bar' are. retractedby' the vcam |42 toithe= inuence of the main: magnet pole piece 32;-"aftx'erv which they typewriter is ready for a repetition ofy the above action of the' same or another type:

AIn' theV above described oper-ation, as' the engagement of the key switch'conta'cts 84', 81, the dischargeof thecondensers I'l 0F andf|22yiand the energization of theI relay magnet H' 'and the selector' magnet' 61 aresub'stantially' instantane-` ous,.the.conducting armature |20 is immediately restored to normal position against the back contact. IZYI, and 'the selector," condenser'is immediately-.recharged for another selecting operation.

. Duringgthe above selecting and-printing opera tiorrftherelay magnet operates -to close` the normallyopen` -relay switch. IEI, |32',4 thus closing "a circuit from terminal yI llthrough conductors I9,

coil lf3-Stor anyv suitable formoftime delaying relayor. similar device, to insurel that the ener" gization f of the'- escapement `magnet shall vbe gde@5 layed enough. to. allow the printing: to takeA place' before the cscapement .lever operates Vto effect spacing, thus to avoid any smearingby.tlieftype.-

The operation voffspacing between wordsefietf, ed by thespacing bar 'is' the same as the spacing operation between letters,A except,.thatfthejan cher-'ed type' andtype bars 54,'5I'Qdo Ynot-movie fromv the inactive' location: andA therefore,dotnet` printpbut leave an unprinted. blankfspacenon-the paper, while `the spacerescapement levergcperatesv,

c typei wheel.4 Thereforeyif thefmiddle ojreither, or;

|41, |42 toeffect .spacing from letter to letter by operation ofconventional escapement means (not shown)`v which 'Ormsno. p artgof K the y `present inventifo'h. Tlietime. delay element may be.` any'l cenyntional delaying means, suchasa convene tio'ally' indicated Ycurrent delaying r. inductance'- lboth endsofy the` spacer bar should.,be.-pressed upon., one'or .both-of th'e spring;` contact'sfj81 Willbe engaged and a circuit will'v be'gestablished through the commutator segmenticorresponding to thefanchored type; block at the instant ,the

anchored.. block Apasses ltheselector, magnet;l l-lencel the'y relay magnet andfsel'e'ctor magnet:- wilb be energizedlbut theselector magnetcannot-rellease the' anchored'` type" block.' Howevertathe.

energized.. rel-ay -magnet 4will close Athe 'normal-lyr open. relay'spacer switch |-3|,' |32. Fig.- Sfand energize-'the spacer escapement magneti 30 witl'it.

When itis desired'.to*printfa'capitalletten'the I Z shift key |-51 (Figs:` 1,17- and .9) .isrdep'ressed;,tol

clos'efthe'- switch |51; and-energize the.= magnetfm;

tof' shi-ft' the releasing selector 'magnet 61# from theflower case typeseries to theupperca'seserieell Depressing the shi-ft key vclosesaupon eachictheit the-@insulated spring` contactsv lli-IL: and. Ia'circiiit is completed from thel terminal |08 through the conductors. IIS; II8; |63, |64, {65th-|24; |25'to: terminal: |09,y thus. energizing the shiftfmagnet 10i and. attracting the armature 66 tothe' end'f. the slot 64'.' They shift! key' may? beheldfdowzi manually ors'by any suitablel means."untilith'e desired. upper case-character or character'sh'ave been? printed; after which. the .shiftA key'zis" raised'.v

y Ifd'esired. I may omit the condenseriIiIl-'ad the resistance H41; and' makethe' relayma'ghet v ture; iong'eif marrone. revolutionl'o'f thebr'u'shl arm rc2-1. this, case `simpleswitch" maybe used"'instea`d Afotthe 'instantaneous' switch'iil,1 or 84e, 81a and; themscianon ebatedcisksmay be omitte'dl,l allowing' thel metail sterfrtpl directly;.l

engage'- 'tllef" ccrit'afct spring" directly. With' rt arrangement' the key switch l'nriayl be heldA close througl'i several' revolutions of inthe' brush, ,sin thev relay` switch r will n'ot vrelease` during` .the g iY tervals betweencommutator vcontact t selecting condenser" |22 will. discharge y and will not 'recharge SO' lorfgaswthe relay:A magi-j rnet' ll''hold's thearm'ature |20,away..lfremtlie Contact I-zl cannet-recite the termmailus;

` If the actuating. condenser'jl'l and the "ref-- sistance I'4 are. used` it `is` alsovpos'sibletto omit the insulation'. coated. v disk! ofl the key switches.. The .high resistance I. I4 is suiciently lowto allow;

the actuating condenseriorechargebetweenthe fastest..strokesf-on.thel keys.; but when contact 'ris engagedcommutatorsegment-91', the., discharge of!` theccndenser H0 vfiefinstantaneous;and: .thesree' 1'1 charge-of the condenser between successive contacts* ofaco'mmutator segment 91, ifa circuit tllr'oughv the "key switch, without the insulated Vcoated disk; is maintained by holdingthe key down. 'Thuswhen a key 'I9 is held down, the

' condenser IH) will not recharge fast enough to accumulate'a charge large enough to cause actuation `of the relay magnet l I a second time.

claim as my invention:

1.` In combination, a lrotary wheel, type bars having their inner ends` pivoted to the wheel and normallyidsposed in an inner position rearward of the fpivot, and movable outwardly substantiallygradial `to the wheel, and having end type faced *forward when the bars are thus disposed radially; means for holding the type in inactive position near theperiphery of the wheel' and selectively releasing them; a platen .adapted to be struck by the type when disposedradially to the wheel-tto effect printing; and cam means engage` ble with the type bars for restoring thel type to inactive positiona'fter striking. Y

. Il In combination', a frame Vhaving side walls arid a floor; a platen on the side walls; a bracket on-fthe'floor; a stationary main magnet shaft of magnetically conductive material mounted on said bracketfastand perpendicular to .and adjacent to one ofthe side walls and parallel to, frontwardly of and lower than the platen; said shaft having a short reduced portion near its free end about over the middle of the oor and a longer further reduced portion extending to the free end ofthe shaft; a large solenoid on said shaft adjacent tothe bracket; a disk shaped magnet pole pieceimounte'd fast on said short reduced portion andfhaving a cylindrical pole face coaxial with theshaft;"uppericase and lower` case type carry- Y netically'held adjacent to said' pole face; and

means for selectively releasing any type of either f f wheel fromsaid face; said platen being adapted `tobe struck by the type when thus disposed.

x3. In combination,v a pair of rotary type wheels disposed side-by-side; a magnet having a cylindrical pole face between the peripheries of the Wheels; -each type wheel having an annular peripheralrib having a cylindrical peripheral face fand deep rabbet grooves on opposite sides of the rib,A the rib having therein a series of transverse apertures almost parallel to the shaft and slightly inwardlyinclin'ed toward-the magnet pole face; and a vseries of type bars disposable substantially radial .to the type wheel or approximately circumferential theretoV in a direction rearward to its position and inclined toward the periphery rofthe vmagnet pole face and Veach having a` laterally turned pivot part disposed in one ofv said apertures, .the pivot part having an angular'v free end to retain, it in the aperture; `the outer ends` of the bar having a type block containing magnetic material adapted when inactive lto be, bythe magnetism of the pole piece, yieldably magnetically held against the centrifugal forcer adjacent to the respective margins of the'peripheral face ofthe magnet; means for selectively releasing any block of either wheel from said face; type carried by the bars andmovable outwardlybycentrifugal force and faced forwardly when 'thus disposed outwardly; and a. platen adapted to be struck by the type'when thus disposed,-the inclination of the angle of the axes of said pivot parts and apertures being .such tha'tupper case and lower case letters will strike in the same .place onl the platen in the mid-plane of the magnet pole face.

4. In combination, av rotary type Wheel having a peripheral rib having transverse apertures; bars pivoted in said apertures and movably carried by the wheel and disposable rearwardly yand movable outwardly by centrifugal force beyond the wheel, and each carrying a type faced forward when thus disposed outwardly; a platen adapted to be struckby the type when thus disposed; and a magnet having a circumferen-i tial pole face adjacent to the periphery of the wheel and adapted to magnetically hold the blocks adjacent tovsaid face; vthe type bars being of a cross-section elongated in a direction transverse to the axis of the wheel to stiffen them; and tapering toward the pivot part, the intermediate part of the bar being slightly outwardly curved and resting on the type wheel to hold thev block slightly spaced from the periphery of theA pole face.

5. -In combination,.a pair of adjacent seriesof circumferentially disposed type; a rotary means carrying said type; said type containing magnetic material and being movably carried by said means in an innerv position and movably urged outwardly to be disposed in an outer position; holding means for holding the. type in inner position against the outward urge; a support adapted to be struck by the type when disposed outwardly; a magnetic device shiftable to a point adjacenttoeither series for removing the -type from the holding influence of the holding means; andf`means for energizingv said device when a desired type is adjacentV thereto.

6. In combinatlon,a pair of traveling members disposed side-by-side each carrying characteristic character determining parts successively to predeterminedv adjacent points;v a support'carrying a surfaceV to receive the characters determined by saidparts; andr a cooperating device movably mounted. to be associated withsaid parts of either member at said points and adapted to cooperate with the part at one of said points to apply to said surface the character determined by the part associated with said'po'int at the time.

"7. In combination, a pair of rotary type carrying wheels disposed 'side-by-side; type bars pivotedY to the wheels and carryingtyperblocks and `when* inactive being disposed rearwardly circumferentially of the wheels; a stationary magnet having' a vcylindrical pole face between said vwheels and'magnetically holding the type blocks in inactive position; a releasing electromagnet adjacent to the path of the inactive blocks of one wheel and adapted when energized` v to draw a passing block from said face and allow centrifugal force to dispose the bar outwardly as; the'wheel rotates; the blocks having printing type on the face which is forward when thus disposed outwardly; a. platen disposed in the path of the type when thus disposed forwardly; keyscorrespcnding to the respective type blocks; means controlled by the respectivel keys when depressed for energizing the release magnet as the block correspondingto the depressed lkey passes; and means for atwill moving, the releasing magnet adjacent to the path of the blocks vof theother wheel.

I egoismo 811 Infcombinati'onr coaxialrotaryf"wheelsdiss posed "side -bysideand `each 'having'a' peripheral rib having apertures inclining" toward the-'other wheel; type 'bars 'having' laterallyi 'turned'V inner ends pivoted4 in said apertures; the2 bars'being normally;- di'spo'sed infvan innerfpositi'on adjacent to= the=peripheryofthe 'wheel and? movable'l out'- wardly substantially radialfto-thewheel,A and having' end type' faced forward when the bars arethus'- disposed radially; meansfor holding the typeinfinactiveposition near the rperiphery of' "the'fwheel" 'and selectivelyreleasing'. them; and a'- p'laten adapted tof be struck' by the f' type in; a common plane midway'betweenfthe `wheels when disposed substantially'. radiallyv tov the wheel?.

9.v In combination; a; platen; a'magnet'having a'narrow cylindrical poleface; upper' and lower case/type" carrying Wheels rotatively mounted coaxial! with',A andA at opposite-sides of; the: pole far-1e;V theupper part of' each wheel being rotatable toward' the platen; each' type wheel havingA a peripheral rib `h'avingrtherein apertures almost parallelftoqthei shaft andI slightly inwardly inclined' toward the magnet'A pole;v type' bars dis'- posable fsubstantiall'y-fradial to the f typev Awl'leelor approximately circumferential thereto in a-direc'- tion? rearward toits rotation and" each having a laterallpivotpart' in yone-ofsaid apertures;` the 'outenendfof-"each bar carrying' a'type--block of a magnetic material adapted't'o be magnetically heldadljacent to' the face-0f the pole piece; vthe intermediate part of each bar'v resting on the type wheel;` each' block having on its forwardfouter facea vrprinting character'adapted to'strike the platen'when thebar'is'radial to the wheel; the angle" of said' pivot' parts being suchftha-t' upper ca sel andl lower' caseI letter blocks willstrike the platen-in'themid'plane ofthe magnet pole'- and means for selectively" releasing' the vblocks from the innuence of 'themagnet;

130'."- Iir' combination, a rotary member; type containing'magnetic'material movably carried by the member in an' inner'v position and movably 'urgedi outwardly to be disposed in' an outerv posi# tion; holding means for yieldably holding the typein'inner position against-the outward urge; la support adapted to be struck bythe type when thus' disposed; a` releasing electromagnet adjacent to the pathk of the'type` in inner' position;

and meansl for 'energizingf'the electromagnet f when "the desired type' is adjacent to` the electromagnet fon-selectivelyJ removing'the type from theinluenc'e of the 'holding means'.A

, 11.l Inccm'bination',V a' pair' of'traveling mem-'- bersidisposed side-byfside' 'each' carrying,y characteristic character determining` parts successively :past predetermined' 'adjacent points' a support ,carrying'a'surface' to receive' the characters deltermi'nedl by said parts; vand a vcooperating device I movabl'y'` mountedto be' at'fwill associated with said parts of either' member lat saidwpoints and ad'apted to be energized by'V an electric current passing therethrough to cooperatewiththe part -at't'h'epoint at theti'me off energization to apply "to said surfacetherch'aracter is Y determined' by therpart 'asso'ciated withlsaid point at the time;

n 1-2. Incombination,l a3'- rotary member; type block-sf containing magnetic" material movably carried- "byi the member' and'l movable outwardly 'bycentrifugal"` force beyond ther member and magnet' having'"afcircumferential pole face for magneticallyh'olding the typ'ef blocks' -in inactive position near the member; a selectinglancl releasingelectromagnethaving'arp'ointed?corefprojected normally' 'adi acent tothey path of "thei-V inactive type-blocks, the mag-nei'lism'I or? the 'el'ctromagnet when instantaneously energized beingf strong enough to cooperate with thefcentrifugal force of.

a-`revolving type block toA withdraw 'thetyp'e block f-'rom'the' innuenceof" the 'said pole piece-'to allow the ce'ni'irifug-al14 force toA disposevthe -typeblock substantially radially outward from said-mem#- ber': af platen adapted-l to be' struck` bythe-type block'when thus disposed; and means"forener'Js gizing-th'e releasing electromagnetwlienthe de siredtype'-block fis' adjacent'theret'o.

13. In combination; a rotary" member; type containing magnetic material movably carried' by the lmember irl-'an` inner' 'position and-'movably urged outwardly' to be disposed in an outer vpesiftion; amagnet-having acircumferental p'olef ce adjacent to the type in the inner position-"`v or holding' thel'type-in innergposition' against'ftlre outwardurge; a supportadaptedto bestruck by the'typewhen thus'disposed; arr electromag# netl adjacent to the path` of the innerposition type forseleci'iively.A removing the type from the influence-of zthe magnetic means; andf'a'v gapin saidl pole -face having' non-magnetic material therein adjacent to the electromagnet.

1'4.-'InX combination, a'vpa-ir of travelingfmen're bers disposed side-by-side each carryingfcharao-A teristic'v character` determining .parts successively past predetermined adjacent points; a support carrying' a surfaceto receiver the characters de termined by'said' parts; a' cooperating device mov-1 ably mounted to be associated. with said parts of either member'atsaid points andv adapte'd to4 be cent to thefperipheries ofthejwhe'els type" blocks of magneticY materia-l carried' by theA `wheels and yielda-bly magnetically held'. in' inactiveosition adjacent to margins 'of the1po1e'faceandwhen withdrawn from said pole facejfbeing'disposable voutwardly to 'active p )s`ition,"'gav horizontal' guide tubev off vertically'jelongatedv rectangular' vcrosse section disposed forward"of"the' Wheels.` and pro# vided' with a'large' cutawayA portionv facingmthe pole'npiece' and a small cutaway'p'ortion facingthe magnet' shaft; a' bracket andi a bracket plate' ad'- Jacent the' 'small cutaway; portion" provided with alined openings receivingjsai'dftube; abar' slidable-in said guide' tube' and guided thereby and provided with an angular en'd portion ofgmagL netic material extended toward the magnetlfshaft and forming'. an armature, thejedge of said cut-, awayl portionadjacent tothe' bracketplate lim-1' iting outward movement' of the armature; a releasing, electromagnet radial vand adiacentito.v the path of'the inactive blocks" of one ofsai'd' margins and mounted on the bar inthe-largecutawayporL tion; meansto energize .the electromagnetwhen a' selected bloei;v is adjacent thereto' for' drawing the block` ir'omsaid periphery;` means urging- 4the bar 'awayfvnfrom said bracket plate to retract a'-l solenoid lf'or 'attracting` ythe arfsaid? armaturef' 16:v recombination a framfiaiiriga ber; a

T t platen-mounted across the frame; a pair of adjacent -coaXial, constantly rotary type-carrying wheels axially parallel to the platen; type blocks of magnetic material carried'by the wheel and yieldably heldin inactive position adjacent to the'wheel and when drawn from said periphery being disposable outwardly to active position and adapted to strike the platen; a releasing electromagnet'adjacent to the path of the inactive blocks of one wheel; means to energize the electromagnet when a selectedY block is adjacent thereto; `a bracket plate mounted on the iloor parallel to the .plane of the type wheels on one side of the wheels and provided at a distance frontward of the axis or" Y the wheels with a rectangular opening; a

vbracket mounted on the opposite margin of the iioorr and'provided with a rectangular opening axially alined with the opening of the bracketr plate; 4a tube tted in said openings and having Y rear cutouts in one-cf which the releasing magnet is mounted; a bar in the tube supporting the electromagnet and having an angular armaturein the other cutout; a tension spring tensioned between the outer end of the tube and said bar for holding the bar in a position with the armature against anedge of the cutout; a solenoid on said plate lon the side remote from the armature and having a core projecting through the plate adjacent tothe armature and adapted when energized to draw the armature to move the releasing electromagnet adjacent to the blocks of the other wheel; and means for energizing the solenoid.

. 17. In combination, a pair of constantly rotary type-carrying wheels disposed side-by-side; type blocks of magnetic material carried by each wheel and yieldably held inv inactive position adjacent to thewheel and when withdrawn from said n periphery being disposablev outwardly to active position; a releasing electromagnet adjacent to the path of the inactive blocks of one wheel; a guided bar supporting the electromagnet and carrying a transverse armature and movable to move' the electromagnet to be adjacent to the path of the blocks of the other wheel; a stationary shift solenoid for attracting said armature; means toenergize the electromagnet when a selected block is adjacent thereto; spacedl superposed keyboard plates; corner portions of said plates having large vertically alined openings therein; insulating disks. covering and secured over said large openings and provided with alined apertures; a shift key having a stem slidable in said `apertures and having a lower end; a pair of 4Separately insulated superposed spring contacts having free ends under the shift key stem; and conductors connecting the spring contacts in i 'serieswith the solenoid.

18. In combination, a frame; a constantly rotary type-carrying wheel therein; type blocks 'containing magnetic material carried by the wheel `and yieldably heldin inactivev position ad- *ja'cent to the wheel and when withdrawn from said periphery being disposable outwardly to active position; a releasing electromagnet adjacent to the path ofthe inactive blocks; a pair of slightlylspaced upwardly rearwardly stepped keyboard plates mounted in the Y frame and comprising steps, corresponding Vsteps having vertically alined guide openings; keys having stems vertically. slidable in said alinedopenings and a button secured onthe top of each stem; a spacing .bar mounted at each end on similar stems mounted in two of said alined openings; a collar fast onth'e upper part of` each stem between the plates; a'spring compressed between the collar and thev lower plate Vto urge thekeys upwardly; -switches corresponding to the type blocks refspectively andoperable`by said stems and means controlled bythe respective switches to energize the electromagnet when the corresponding block is adjacent thereto for drawing theblvock from said periphery. o

- 19. In combination, a rotary member; type containing magneticmaterial movably carried by the-member in -an inner position and movably urged outwardly to ,be disposed'in an outer position; holding meansv for holding the type in inner positionagainst the outward urge; a support adapted to be struck bym-the type when thus disposed; a releasing magnet adapted when instantly energized to remove the .type fromthe influence of. the holding means; an insulated metal keyboard plate; metal keys corresponding tothe type and movable on the plate; insulated contacts engageable by the keys; and means con,- nected in electric circuit between said plate and vcontacts and set in operation by vpressing-the to be actuated to cooperate with said parts to move a .desired determining part to operative position; aplurality of switches corresponding to said parts and adapted to make instantaneous contacts and means vcooperating with said switches-for causing said instantaneous ycurrent and cooperating withv an actuated switch for actuating said device; each switch. comprising an insulated metal-plate having an opening; a yieldably raised key having a metalstem slidable in said opening and having a lateral projection having insulation on one of its faces; and an insulated metal contact spring having its free end engageable by saidprojection as the stem moves.

21. In combination, a plurality of characteristic character determining parts movable .to `operative position; a cooperating device adapted 'to` receive an instantaneous electric current thereby lto be actuated to cooperatewith said parts to move a desired part to operative posi,- tion; a plurality of switches corresponding to said parts and adapted to make instantaneous contacts and means cooperating with said switches for causing said instantaneous currentand Vcooperating with an actuated switch for actuating said device; each switch comprising an insulated` metal plate having an opening; a key having a metal stem slidable in said opening and having a lateral projection having insulation on its upper and lower faces; and an insulated metal contact spring having its free end engageable by said projection. i

22. In combination, a plurality of-characteristic character determining parts movable to operative position; a cooperating device `adapted to receive an instantaneous electric current thereby to be actuated to cooperate with said parts to selectively move a desired partto operative position; a plurality of switches corresponding to said parts and adapted to make instantaneous contacts; and --means cooperating with said switches for causing said instantaneous current; each switch comprising an insulated metal plate having an opening; a yieldablyraised metalstem slidable in said opening: and having a metal disk on its lower end; an upper insulating coating von the upper and peripheral faces of the disk; a lower insulating coating on the lower face of the disk leaving only a narrow causing the upper coating to cam past the hook Y without contact with the disk.

23. In combination, means comprising a movable part and a cooperating device adapted to reg ceive electric impulses at diierent `positions of the movable part to perform selected operations depending upon said positions; upper and lower insulated keyboard plates having vertically alined guide openings; yieldably raised keys corresponding to said operations and having metal stems slidable in said openingsk and each having a laterally disposed lower end projection having an insulating coating on its. upper face; an insulated block on the lower face of the lower plate adjacent to each stem; a spring metal contact mounted on each insulating block and having its free end disposed under the projection and engageable by the projection when the key is pres-sed and engageable by the coating only as the key is restored; and means connected in circuit between said plate and the respective contacts for supplying said impulses to lsaid device at a time to cause the operation corresponding to the depressed key.

24. In combination, a type-carrying wheel constantly rotary at a high speed; type blocks of magnetic material carried by the wheel and yieldably held inv inactive position adjacent to the wheel and lwhen drawn outwardly from said periphery .being disposable outwardly to active position; a releasing electromagnet adjacent to the path of the inactive blocks; spaced superposed insulated metal keyboard plates having alined openings; metal character keys corresponding to .isy

surface the corresponding character; key switches corresponding to the determining parts respectively; 4a non-rotary commutator havinggsegments electrically connected to oneelement. ofy

respective corresponding key switches; alconducting member connected tofthejother element ofthe switches; a source of current;a brush arm Arevolvable in step vwith the traveling member v and electrically connected to one source terminal and successively engageable with the commutator segments; a .relay magnet having one end of its coil connected to said'conducting member and the other Ato the other terminal; and means operated by the relay magnetfor actuatingsaid device. A l .f

f 26. In combination, a, frame; a constantlyrotary type-carrying wheel therein; type blocks containing magnetic material carriedby the wheel land yieldably held in inactive positionadjacentv to the wheel and when withdrawn from'said periphery being disposable outwardly to active position; a releasing electro-magnet adjacent to the path of the inactive blocks; key switches corresponding to the type .blocks respectively; a countersh'aft geared to the type wheel to rotate at thesame speed; a commutator bracket mounted in the `frame and having a bearing opening alined with l the countershaft; a commutator shaft loose in said opening; a commutator fast on the commutator shaft adjacent'to the end of the countershaft and having segments corresponding` in order to the characters kof said type blocks fand associated key switches; an adjusting disk fast on the inner" end'of the commutator shaft; a clamping screw adjustable in said bracket, and carrying washers under its yhead engaging opposite faces of the disk for adjustably holding the disk fast; the commutator segments beingelectrically connectedto one member of respective corresponding key switches; a brush arm on vthe countershaft successively engageable with the commutator segments; a relay magnet havingfits the type blocks and having stems movablev in j the perforations of the plates; each metal stem having a lower end disk; an insulating coating on theupper face of the disk an insulated block secured fast to the lower face of the lower plate adjacent to each stem; a spring metal Icontact mounted on each insulated block and having its i free end spaced under the adjacent disk and engageable for a period longer than the rotation of the type wheel, by the disk when the key is pressed downwardly at ordinary speed and engageable bythev coating only, as the key is restored; a non-rotary commutator having segments electrically connected to respective corresponding spring,r contacts; a brush arm revolvable in step with the wheel and engageable with the segments; a relay magnet having its coil lconnected in circuit between said keyboard and brush; and means operated by the relay magnet to energize the releasing magnet. I l Y 25. In combination, a. traveling member carrying characteristic character determining parts; a support carrying a surface to receive the characters determined by said parts; a cooperating device adjacent to which said parts successively pass and adapted to be actuated to cooperate with the part adjacent thereto to apply to said coil connected in circuit between the other members of thekey switches and the brush armyand means operated by the relay magnet when energized to instantaneously energizeV the releasing electro-magnet.

27. In combination, a pair of rotary type-'carrying wheels disposed side-by-side; type bars pivoted to the wheels and carrying type blocks-containing magnetic material, the bars when in` inactive position being disposed rearwardly circumferentially of the wheels; a stationary magnet having a peripheral pole face between said wheels and magnetically l'ioldingthe` type blocks infinactive position; a releasing electromagnet adjacent to the path of the inactive blocks'of 'one wheel and adapted when energized to draw a passing block lfrom said face and allow centrifugal force to dispose the bar outwardly;`the block having printing type; a platen disposed inthe path of the type when disposed outwardly; means v tor energizing the release magnet and causing 1t to selectively withdraw type from either wheel;

gears secured fast to the outer faces of the wheels;

a countershaft carrying fast thereon pinion-sen'- gaged with said gears, and means for driving the countershaft.

28. In combination, a pair oi coaxial rotary type-carrying wheels disposed side-by-side; type bars movably .carried by each wheel and carrying type blocks containing magnetic material disposable outwardly byvcentrifugal force beyond the periphery of the wheelas the Wheel rotates; a stationary magnet `hs-ivingf a narrow. cylindrilcal'pole face betweenthe peripheries of said wheels `for magnetically holding the type blocks 'A in 'inactive position near the periphery of the Wheels; means for selectively'releasing the type blocks; the blocksy having printing type on the face .which is forward whenv thus disposed outwardly; a platen parallel to'theaxis Aof rotation oflthe wheels; gears secured to the outer side face'` of the wheels; an intermediate stationary bearing bracket mounted in the plane of the pole piece having a, bearing openingaxially parallel vtosaid laxis under the platen; a countershaft mounted in said bearing opening and carrying' passing therethrough to cooperate with the part at the point at the time of energization to apply to said surface the character determined by the part associated with said point at the time; an insulated common conductingmember; switches Ycorresponding to the characters and having one switch element connected to said conducting member; a non-rotary commutator havingsegments corresponding to said characters electrically connected to the other element of respective. correspondingkeyswitches; a brush arm traveling in step with the character carrying Vmember and engageablel with the co-mmutator segments; a relay magnet having its coil connected in circuit between said conducting member'and brush; and means operated by the relay magnet when energized to energize the cooperating device,

30. In combination, a' traveling member carrying characteristic character determining parts successively past a predetermined point; aA support carrying a surface to receive the 'characters "determined by said parts; a cooperating device associated with said parts lat said point and adapted to be energized by' an electric current passing therethrough to cooperate with the part at the point at the timel of energization to apply to said surface thecharacter 'determined by the part associated with said point at the time; a condenser; means to charge the condenser; and

means to discharge the condenser through saidv device at a predetermined time.

31."In combination, a traveling member carrying characteristic character determining parts successively past a predetermined point; a supvport carrying a surface to receive the characters determined by said parts; a cooperating device associated with said parts at said point and adapted to be instantly energized by an electric current passing therethrough'to cooperate with the part at the point'at the time of energization to apply to said surface the character'determined by the part associated with said point at the time; a condenser adapted to be instantly clischarged through the cooperating device; an

`insulated common conducting member; switches corresponding to the characters and having one switch element connected to said conducting member; a non-rotary commutator having segments corresponding to said characters electrically 'connected to the other element of respec- 'aciavee Y tivel corresponding key-v switches; a brush arm traveling in 'step with the character Kcarrying memberand engageable with the commutator segments;v arelay magnet having its coil connected in circuit between lsaid conducting memberand brush; means to charge the condenser; and means operated; by the relay magnet when energized to discharge the'condenser'throughthe cooperating device. o v

32. In combination, a rotary type-carrying wheel; type blocks containing magnetic material carriedby the'wheeland yieldably heldin inactive position adjacent to the`wheel and when released being disposable outwardly to active position; a, releasing electromagnet adjacentv to the path of the inactive blocks;`key switches corresponding to the type blocks respectively; a non-rotary commutator having segments connected to one element of respective corresponding key switches; a conducting member connected to the other switch elements; a source of current; a brush arm revolvable in step with the type carrying wheel and connected to'one source terminal and engageable with the segments; a relay comprising a relay magnet having one end of its coil connected to said conducting member and the other to the other source terminal, a normally retracted conducting armature adiacent to the relay magnet, a back contact electrically connected to said other terminal, and a front contact connected through the releasing magnet coil to said arm; and a condenser connected between said first named terminal and said armature; whereby said condenser will be normally charged and when any key switch is closed and said brush arm at the same time engages the corresponding commutator segment, said relay magnet will be energized, said armature retracted, said condenser discharged through the release magnet, and said release magnet energized at the instant that the corresponding type block passes thereby to withdraw the type block from the wheel to allow the type block to move outwardly to active position.

33. In combination, a constantly rotary typecarrying wheel; type blocks containing magnetic material carried by the wheel and yieldably held in inactive position adjacent to the wheel and when withdrawn from said periphery being disposable outwardly to active position; a releasing electromagnet adjacent to the path of the inactive blocks; a metallic keyboard; key switches on the keyboard corresponding to the type blocks respectively and each having one switch member connected to the keyboard; a non-rotary commutator having segments electrically connected to the other member of respective corresponding key switches; a current source; a brush arm revolvable in step with the type-carrying wheel and successively engageable with the commutator segments and electrically connected to one terminal of the source; a relay magnet having its coil connected in circuit between the keyboard and the other terminal of said source; a conducting armature adjacent to the relay magnet and normally retracted therefrom; a back contact engageable by said armature when retracted and connected to said other terminal; a condenser having one vplate connected to said iirst named terminal and the other to said armature; and a front relay contact connected through the Vcoil of the releasemagnet to said first named terminal, and engageable by the armature when retracted bythe relay magnet.

34. In combination, a constantly rotary typecarrying wheel; movable type blocks containing magnetic material movably carried bythe wheel in a series of peripheral inactive locations adja'- cent to the periphery of the wheel, and when withdrawn from said periphery being disposable outwardlyto active position; a releasing electromagnet adjacent to the path ofthe inactive location blocks; a source of current; a relay-comprising a relay magnet, a normally retracted conducting armature, a back contact electrically connected to one terminal of the source, and a front contact connected through the releasing magnet coil to the other terminal of said source; a condenser connected between said conducting armature and said other terminal; and means for selectively energizing the relay magnet when the desired type block is adjacent to the yreleasing electromagnet.

35. In combination, a constantly rotary typecarrying wheel; type blocks containing magnetic material carried by the wheel and yieldably held in inactive position adjacent to the wheel and when withdrawn from said periphery being disposable outwardly to active position; a releasing electromagnet adjacent to the path ofV the inactive blocks; key switches corresponding to the type blocks respectively; a non-rotary commutator having segments electrically connected to onev member of respective corresponding key switches; a brush revolvable in step with the type-carrying wheel and successively engageable with the commutator segments; a source of current; arelay magnet having itscoil connected in circuit between the other members of the key switches and one terminal of said source; means operated by the relay magnet for energizing 'the releasing electro-magnet; a resistance and a condenser connected in series between the brush and said other terminal of the source, the resistance being nearer the brush; and a high resistance connected between said first named terminal and the condenser element nearest the brush.

36. In combination, a constantly rotary typecarrying wheel; a spacer block and type blocks containing magnetic material carried by the wheel, the spacer block being positively heldin inactive position adjacent to the wheel, the type blocks being yieldably held in inactive position and when drawn from said periphery'being disposable outwardly to active position; a platen adapted to be struck by the active position type 1' or printing; a releasing electro-magnet adjacent to the path of the inactive blocks for releasing the type to active position for printing; a spacer bar and keys corresponding to the spacer blocks and type blocks respectively; a horizontally disposed escapement electro-magnet; a relay magnet; means operated by the respective keys to energize the relay magnet when the corresponding block is adjacent to the releasing electromagnet; means operated by the relay magnet when energized for energizing the releasing electromagnet and the escapement magnet; a support for the escapement electro-magnet; a pair of posts on said support at opposite sides of the rear end of the core of the escapement magnet; and an upright lever intermediately pivoted between the upper ends of said posts and carrying an upright escapement actuating arm'and carrying at the lower end an armature opposite the magnet core end; the block corresponding to the spacer bar being suitably secured fast ininactive position on the type wheel to prevent printing when only the spacing bar is depressed,

theqspacer block serving tovmaintain the balance of the type wheel.

37'. lin combination, a constantly rotary typecarrying wheel; type blocks containing magnetic material carried. by the wheel and yieldably held in inactive position adjacent to the wheel and when withdrawn from said periphery being disposable outwardly to active position; a releasing electro-magnet adjacent to the pathof the inactive blocks; key switches corresponding to the type. blocks respectively; a non-rotary commutator having segments electrically connected tov one element of respective corresponding key switches; a conducting member connected to the other element of the switches; `a source of current; a brush arm revolvable in step with the type-carrying wheel and electrically connected to--one source terminal and successively engageabl'e with the commutator segments; a resistor; a relay comprising a relay magnet having one end off its coil connected to said conducting member and the other tothe other source terminal, a normally retracted conducting armature adjacent to the relay magnet, a back contact electricallyvconnected to the irst named terminal, and a front contact connected through the releasing magnet coil to said iirst named' terminal; a condenser connected between said first named terminal and said armature; an escapement.mag-V net; and means operated by the relay magnet for energizing the escapement magnet.

38. In combination, a constantly rotary typecarrying wheel; movable type blocks of magnetic material movably carried by the wheel in a series of peripheral inactive locations adjacent to the periphery or" the wheel, and when withdrawn from said periphery being disposable outwardly to active'position, one inactive location in the series beingv a spacer location and free of any movable type block; a releasing electromagnet adjacent to the path of the inactive location blocks; a source of current; a relay magnet; means operated by the relay magnet for energizing the releasing electromagnet; means for selectively energizing the relay magnet when the desired location is adjacent to the releasing electromagnet; and a spacer escapement solenoid, a normally open relay switch closed by said relay magnet when energized and a time delay element all connected in series between the source terminals whereby the spacer solenoid receives delayed current each time the relay magnet is energized, whether a type block or spacer location is adjacent to the releasing electromagnet.y

39. In combination, a rotary member; type elements movably carried by the member in an inner position and movable outwardly to be disposed in an outer active position; a support adapted to be struck by the type elements when thus disposed;

and a cam engageable by theV type elements after striking to restore them to said inner position.

40. In combination, a yrotary type-carrying wheel; type bars movably carried by the wheel and lcarrying -type blocks of magnetic material and disposable substantially radially outwardly by centrifugal force beyond the periphery of the wheel as the wheel rotates; a magnet having a circumferential pole face adjacent to the periphery of the wheel for holding the type bars in inactive position near the periphery of the wheel; means for selectively releasing the type blocks; the blocks having printing type on the face which is forward when thus disposed outwardly; a platen parallel to the axis of rotation of the wheel and adapted to be struck by the type when the bar is disposed substantially radially; a bracket mounted under the platen in the plane of movement of the striking type; and a rubber coated spring cam plate of sheet metal mounted on said bracket and disposed approximately tangential tothe lower front face of the platen and the upper rear periphery of the type wheel, and having its upper margin rearwardly curved to act as a restorer cam to be engaged by an active type bar as the type thereof strikes the paper on the platen, and to cause the type block to draw back suddenly, the bar and block camming on the face of the spring cam plate and being moved by the cam plate into the eld of the magnet pole face to be held adjacent thereto.

41. In combination, a rotary type-carrying wheel; type bars movably carried by the wheel and carrying type blocks of magnetic material and disposable outwardly by centrifugal force beyond the periphery of the wheel; a magnet having a pole face adjacent to said periphery for holding the type blocks in inactive position near the periphery of the wheel with the type printing faces disposed outwardly; meansfor selectivelx7 releasingthe type blocks; the blocks having the printing faces forward when thus disposed outwardly; a platen adapted to be struck by the forwardly faced type; a stationary tubular casing having on the ends of its side walls perforated ears adjacent to the type wheels; a pin loose in the perforations of the ears; a soft rubber roller rotary on the pin and engaging the outwardly disposed faces; one or more reservoirs of the ballpoint pen type disposable side-by-side longitudinally in said casing and radial to the roller and having `their balls engaging said roller, thereby to spread ink upon the rotating roller to be picked up by the type engaging the roller; a lid closing the rear end of the casing; a plate against the inner ends of the reservoirs; and a spring compressed between the plate and lid to hold the balls against the roller.

42. In a typewriter, a continuously rotating rotor; a plurality of levers, each pivotally mounted on said rotor; a character element and an armature carried on each lever; all of said armatures normally lying in an annular lane and each lever being so positioned when swung about its axis from rest position on the rotor while the rotor rotates that the character element carried thereon is brought to printing position; means to restore the moved lever to normal rest position on the rotor; an electro-magnet means, adapted when actuated to direct its force in the lane of the armatures, attracting one of said armatures whose associated character element is thereby caused to move to printing position; a plurality of key circuits; and an electrical selecting means to bring the particular key circuit which is brought to condition to operate, into energizing relation with vthe electro-magnet means. g

43. In a typewriter, a continuously rotating rotor; a plurality of levers, each movably mounted on said rotor; 2, type element and an armature fast on each lever; all of said armatures normally lying in an annular lane and each lever being so positioned when moved from rest position on the rotor, that the type element carried thereon is brought to printing position; and a single electro-magnet near the lane for selectively exerting a force on one of vsaid armatures.

44. In a typewriter, a continuously rotating rotor; a plurality of levers, each pivotally mounted on said rotor; a type element and an armature carried on each lever; all of said armatures normally lying in an annular lane and each lever being so positioned when swung about its axis'as the rotor rotates, that the type element carried thereon is brought to a p-redetermined printing position; and a single stationary electromagnet having the axis thereof substantially in the plane of the lane for selectively attracting one of said armatures.

45. In a typewriter, a rotor; a plurality of levers, each pivotally mounted on said rotor; a type element and an armature carried on each lever; said armatures normally lying in annular lanes, each lane being in a plane perpendicular to the axis of rotation of the rotor and each lever being Aso positioned when swung about its axis during rotation of the rotor, that the type element carried thereon is brought to printing position; means for producing' an electro-magnetic field adapted when actuated to direct its force in one of the lanes of the armatures; and means for shifting said field from one lane to another.

46. In combination, a rotor; type members mounted on the rotor and adapted to move outwardly'from the periphery thereof and each provided with a character element and a movable armature; and a non-rotary electro-magnet near the path of the armatures of the members.

47. In combination, a rotor wheel; type members mounted on the wheel andadapted to move outwardly from the periphery of the wheel to printingposition, and a single magnet for holding the members in a normally retracted position near the periphery of the wheel.

48. In combination a rotor Wheel, type levers pivoted on the wheel, each provided with a character element and armature both fast on the same arm of each lever, and adapted to swing to printing and retracted positions, in retracted position the armatures lying in a common path during rotation of the wheel; and electro-magnetic means near said path.

49. In a typewriter, a rotaryprinting member having movably mounted thereon type pieces each having an armature; a stationary commutator having segments equal in number to said pieces; a brush arm in step with the member and adapted to sweep said segments; electromagnetic means near the path of the armatures of the pieces; and a plurality of key circuits each comprising one of said segments for selectively energizing said electro-magnetic means when the printing member is in predetermined positions of rotation.

v50. A typewriter comprising a rotary printing wheel; type members movably mounted on the whe-el each having a character end portion adapted to move outwardly to printing position and provided with an armature; inner and outer magnetic means adapted `to act on said armatures; and means for selectively making the effect of the outer magnetic means on particular armatures dominant over the effect of the inner magnetic means.

51- III a typewriter, a rotary printing wheel; type levers pivoted on the wheel and having armatures constrained to move in a plane perpendicular to the axis of rotation of the wheel; andan electro-magnetic means near the armatures and comprising a substantially stationary solenoid whose axis is in said plane.

52. In a typewriter, a rotary printing wheel; type blocks movably mounted on the wheel for movement to outward and retracted position and containing magnetic material; and electro-magnetc means near the path taken by the blocks in retracted position as the wheel rotates, for

exerting a magnetic force on the blocks.

LAWRENCE R. PROUTY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Garrison Feb. 10, 1885 Number Number Number Name Date Beals Oct. 8, 1907 Richards Nov. 19, 1907 Weston Nov. 24, 1908 Carroll Sept. 3, 1929 Bryce et a1 Sept. 21, 1937 Ruderfer Aug. l0, 1948 Harrold et al July 5, 1949 FOREIGN PATENTS Country Date Great Britain of 1910 

